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Chapter 2 Building an Object-Oriented Model
49
Attribute properties
An attribute has the following properties:
Property
Description
Maximum
length
Parent
Object to which the attribute belongs to
254
Name
Name of the attribute
254
Code
Reference name for the attribute
254
Comment
Descriptive comment for the attribute
—
Stereotype
Subclassification of an attribute derived from an
existing one. Extends the semantics of an attribute
without changing it's structure
—
Data Type
Set of instances that share the same operations,
abstract attributes, and relationships, and
semantics
—
Visibility
Visibility of the attribute, whose value denotes
how it may be seen outside its enclosing name
space
—
Multiplicity
Specification of the range of allowable
cardinalities that a set may assume
—
Initial value
Initial value of the attribute
—
Changeability
Specifies that the value of the attribute cannot be
modified once the object has been initialized
—
Length
Maximum number of characters
—
Precision
Number of places after the decimal point, for data
values that can take a decimal point
—
Domain
Name of the associated domain
—
Static
Defines the attribute as static, meaning it cannot
be modified
—
Derived
Indicates that the attribute is a calculated formula
—
Identifier
When selected, converts the attribute into a
primary key after generation of the OOM to a
PDM
—
Property
When selected, converts the attribute into a
property after generating PowerBuilder objects
from the OOM
—
Содержание Powerdesigner 7.5
Страница 1: ...OBJECT ORIENTED MODEL User s Guide POWERDESIGNER 7 5...
Страница 8: ...viii...
Страница 22: ...Defining OOM properties 12...
Страница 97: ...Chapter 2 Building an Object Oriented Model 87 4 Modify the operation display preferences 5 Click OK...
Страница 144: ...Defining check parameters 134...
Страница 208: ...Generating for XML 198 6 Click OK An XML file is generated with the file extension xml...
Страница 210: ...Customizing scripts 200...
Страница 224: ...Generating a CDM from an OOM 214...
Страница 238: ...Generating a PDM from an OOM 228...
Страница 260: ...Object language editor categories 250...
Страница 268: ...Applying business rules to objects 258...
Страница 288: ...278...